lsepidemicsituationsystem8/src/com/utils/JDBCUtils.java

package com.utils;


import java.sql.Connection;
import java.sql.DriverManager;
import java.sql.ResultSet;
import java.sql.Statement;


public class JDBCUtils {

    private static String driver = "com.mysql.jdbc.Driver";
    private static String url = "jdbc:mysql://localhost:3306/lsyqfksys";
    private static String user = "root";
    private static String psw = "105293";

    public static Connection getConnection(){
        Connection connection = null;
        try {
            Class.forName(driver);
            connection = DriverManager.getConnection(url, user, psw);
            System.out.println("连接成功");
        }
        catch (Exception e){
            e.printStackTrace();
        }

        return connection;
    }

    //释放资源,对于查询
    public static void close(ResultSet resultSet, Statement statement, Connection connection) {
        if (resultSet != null) {
            try {
                resultSet.close();
            } catch (Exception e) {
                e.printStackTrace();
            }
        }

        if (statement != null) {
            try {
                statement.close();
            } catch (Exception e) {
                e.printStackTrace();
            }
        }

        if (connection != null) {
            try {
                connection.close();
            } catch (Exception e) {
                e.printStackTrace();
            }
        }
    }

    //释放资源，对于更新
    public static void close(Statement statement, Connection connection) {
        if (statement != null) {
            try {
                statement.close();
            } catch (Exception e) {
                e.printStackTrace();
            }
        }

        if (connection != null) {
            try {
                connection.close();
            } catch (Exception e) {
                e.printStackTrace();
            }
        }
    }

    //关闭资源，用于查询
    public static void close(ResultSet resultSet) {
        if (resultSet != null) {
            try {
                resultSet.close();
            } catch (Exception e) {
                e.printStackTrace();
            }
        }
    }



}